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href="../../../topics/sdk/spi/spi_user_guide_2.html" id="spi-d5856e5805-link"><span class="ph">Q</span>SPI 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="uart_user_guide-d5856e5879" class="topicref" data-id="uart_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action uart_user_guide-d5856e5879-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/uart/uart_user_guide_2.html" id="uart_user_guide-d5856e5879-link">UART 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_user_guide-d5856e5951" class="topicref" data-id="usb_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_user_guide-d5856e5951-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb_user_guide_2.html" id="usb_user_guide-d5856e5951-link">USB 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e6011" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e6011-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/mac/mac_user_guide_2.html" id="id-d5856e6011-link">MAC 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d5856e6083" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d5856e6083-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d5856e6083-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/qep/qep_user_guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">QEP 使用指南</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;"></div><div class="- topic/body body"><p class="- topic/p p" data-ofbid="d47566e19__20250121171517"><span class="- topic/ph ph">Luban-Lite</span> 中主要使用了 QEP 模块的递增/递减计数功能。内部信号 QEP_DIR 固定选定为递增/递减的方向，QEP_A 接入输入信号。此外 QEP_A
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的信号可以配置为上升沿触发一次 QEP_CLK 有效边沿，或上下沿均可触发一次的 QEP_CLK 有效边沿。</p><div class="table-container"><table class="- topic/table table frame-all" id="id__table_mcc_zwh_fdc" data-ofbid="id__table_mcc_zwh_fdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">术语定义</span></caption><colgroup><col style="width:27.47252747252747%"/><col style="width:72.52747252747253%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_mcc_zwh_fdc__entry__1">术语/缩略语</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_mcc_zwh_fdc__entry__2">定义及说明</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_mcc_zwh_fdc__entry__1">QEP</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_mcc_zwh_fdc__entry__2">Quadrature Encoder Pulse，正交编码脉冲电路，属于 PWMCS 中的一个子模块</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_mcc_zwh_fdc__entry__1">PWMCS</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_mcc_zwh_fdc__entry__2">PWM Control System，PWM 控制系统</td></tr></tbody></table></div><section class="- topic/section section" id="id__qep" data-ofbid="id__qep"><h2 class="- topic/title title sectiontitle">QEP 工作原理</h2>
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<figure class="- topic/fig fig fignone" id="id__id3" data-ofbid="id__id3"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_yn2_zwh_fdc" src="../../../images/qep/quaddecoderblock.png" alt="quaddecoderblock"/></div><br/><figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">QEP 模块的增减计数功能框图</span></figcaption></figure>
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<p class="- topic/p p" data-ofbid="d47566e59__20250121171517">以 D21x 为例，QEP 模块支持 2 路，所以最多可实现 2 个 QEP。</p>
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